What is a compression spring fixed thermocouple?
WRET-01 type compression spring fixed nickel-chromium-constantan (E type) thermocouple. The end of the thermocouple is closely attached to the surface of the object to be measured through a compression spring to improve the reliability and accuracy of the measurement. It can be used in conjunction with display instruments to directly measure the temperature within the range of 0-400℃. The thermocouple has a flexible extension wire, which can be bent freely, has the characteristics of short thermal response time and convenient use. It is suitable for plastic extruder, light textile, food and other industries.

Performance characteristics of compression spring fixed thermocouple:
● Suitable for measuring the surface temperature of objects
● Fast thermal response time and accurate measurement
● Simple structure, easy to install

The structure principle of WRET-01 compression spring fixed thermocouple

The structure of WRET-01 thermocouple is shown in the figure above: it is composed of protective tube, mounting bolt, locking sleeve, spring and thermocouple wire.
The working principle of WRET-01 thermocouple: The indexing characteristics and allowable deviation, the temperature compensation of the reference junction (cold junction), and the connection method with the display measuring instrument are the same as those of general thermocouples.

Installation method of WRET-01 compression spring fixed thermocouple

The installation method of WRET-01 compression spring fixed thermocouple is shown in the figure above. Fix it on the object to be measured, first tighten the connecting bolt on the object to be measured, and then close the thermocouple to the object to be measured, tighten the screw of the ferrule, and then tighten the ferrule.

Model specifications of WRET-01 compression spring fixed thermocouple

Model number	Index number	Temperature range	Thermal response time	Protection tube material
WRET-01	E	0～400	<5	stainless steel 1Cr18Ni9Ti
specification				Connecting bolt l 2mm
Total length L mm		Protection tube l 1mm		35 or 70
1000 1500 2000 2500 3000 3500 4000		30 30 30 30 30 30 30
1000 1500 2000 2500 3000 3500 4000		60 60 60 60 60 60 60

Note: The order must be stated:
1) Product M and model number;
 2) Total length and depth (L×l1×l2);
3) The indexing number marked with "*" means ordering with special specifications.